Bobbin-holder.



WITNESSES a. %m M,

S. W. WARDWELL.

. BOBBIN' HOLDER.

7 APPLICATION FILED APR. 22. 1902.

TNE "cams PETERS no. PHOYO-LITHO.. WASNXNGYO'N, D. 6.

PATENTED AUG. 25, 1903.

2 SHBET8-SHEBT IN l/f N TOR NO. 737,050. PATENTBD AUG. 25, 1903. S W WARDWELL BOBBIN HOLDER.

APPLICATION FILED APR. 22, 1902.

2 SHEETS SHEET Z.

N0 MODEL.

Fig. 4.

Fig. 5.

A /I/EN TOH m W/ TA/ESSES. 5. mm.

AfTOH/V/EYS UNITED STATES- iatented August 25, 1903.

PATENT O ICE.

UNIVERSAL WINDING COMPANY, OF PORTLAND, MAINE, A CORPORA- TION OF MAINE.

BOBBlN-HOLDERI SPECIFICATION forming part of Letters Patent No. 737,050, dated August 25, 1903,

Application filed Ap'ril 22, 1902. Serial No. 104,21 (No modeli) lo aZZ whom/ft may concern:

Be it known that I, SI ON W. vWARDWELL, a citizen of the United States, residing at Providence, county of Providence, and State of Rhode Island, have invented a new. and useful Improvement in Bobbin-Holders, of which the following isa specification.

My invention relates to supply or bobbin holders for use in connection with winding or other machinery towhich yarn is supplied at high speed from cops, bobbins, 850.

My invention provides for the delivery of yarn. with greater uniformity of tension than has heretofore been attainable, permits the employment of bobbins from which the yarn could not otherwise bewithdrawn over the end, and diminishes the change in twist incident to withdrawing yarn from over the end of a bobbin.

The accompanying drawings, illustrating my invention, illustrate, respectively, Figure 1, a sectional view of the preferred embodiment of. my invention; Fig. 2. a sectional View of the same on the line 2 2; Fig. 3, a modification; Fig. 4, the manner in which my invention is used in conjunction with the machine; Figs. 5 and 6, diagrammatic views illustrating the operation of my invention.

My invention consists in mounting the supply-package, which for convenience will be termed a bobbin, on substantially frictionless bearings to rotate as the yarn is withdrawn therefrom and to deliver the yarn from the outside of said bobbin over its end. The yarn is therefore delivered partly by the unwrapping action due to the revolution of the yarn about the bobbin and partly by the rendering of the yarn from the bobbin due to the rotation of the latter.

In the drawings, Figs. 1 and 2, o is a sleeve of appropriate size and form to fit the bobbin 1) and mounted on a pivot-bearing on the spindle c. The said pivot-bearing consists, preferably, of a hardened step cl, secured in the tip of the spindle c, and in it'is seated the conical pointed screw 6, which in turn is secured in the end of the sleeve to. The ends of the sleeve are formed with bearings f and g for the spindle, and the upper end is counterbored to receive the step d, which is of greater diameter than the spindle and which, abutting the shoulder h, formed by thecounterbore, serves to limit the longitudinal movement of the sleeve in one direction. Movement in theopposite direction is limited by engagement of the screw 6 with the step d. The conical cup-shaped seat in which the screw 6 bears, serves to hold enough oil to maintain the lubrication of the pivot-bearing for an extended period. To replenish the oil, which is required only at long intervals, the screw eis simply removed to gain access to the step. That the bobbin-holder a may be as light of weight as possible the portion intermediate the bearings f and g is formed with side openings, leaving connecting bars or staves & '6 i. V

Fig. 4 shows the manner in which my invention is used on a winding-machine. The bobbin-holder is mounted axially in line with the eyeor point j, through which the yarn is to be delivered. This mode of withdrawing materials from a bobbin is more effective than the modes heretofore employed-win, by end delivery or by unrolling. End delivery is that mode of delivery in which the material is withdrawn from a non-rotatable bobbin over its'end to a point axially in line with the bobbin, the yarn revolving about and unwrapping from said bobbin. Many materials can be withdrawn freely from a non-rotatable bobbin by end delivery, their weight and the speed of revolution. about the bobbin causing a degree of ballooning, which swings the yarn free from the surface of the bobbin. Heavy and medium heavy materials must be wound at reduced speed, because at high speed the degree of ballooning is so great that adjacent yarns interfere and frequently tangle and break. Fine yarn is not unwound freely by end delivery, because the resistance of the air to the movement of the yarn tends to keep it against the surface of the bobbin and cause it to drag over the latter. The direction and tendency of this air resistance is indicated in Fig. 5 by the arrow 10.

Delivery by unrolling or rotation is that mode of delivery whereby the yarn is withdrawn laterally from a rotating bobbin. This type of delivery is not adapted for use where the yarn must be withdrawn at a high rate of speed, because the bobbins from which the yarn is withdrawn are crudely made and invariably eccentric. When rotated at high speed, there is an attendant chattering due to their mass and eccentricity, the momentum and inertia due to their mass, and the irregularity with which the yarn is wound on them.

Rotation of the bobbin when mounted 011 my novel holder is due to centrifugal action of the yarn, to the deflection of the yarn from the plane perpendicular to the axis of the bobbins rotation in which it leaves said bobbin, to the line of direction leading to the eye or guide to which the yarn is delivered, and to the resistance of the air to the revolution of the yarn about the bobbin. The air resistance to the revolution of the yarn about the bobbin coacting with its change of direction causes a tangential reaction on the bobbin tending to rotate the latter. This tendency increases with increased speed of revolution of the yarn about the bobbin until, with the centrifugal effect of the revolving yarn, it overcomes any frictional resistance of the bobbin to rotation. As the bobbin rotates the reaction of the air is in the opposite direction, as indicated in Fig. 6 by the arrow 11, tending to strip or throw the yarn free from the bobbin and prevent it from dragging on the surface of the latter. If the yarn is heavy, the resistance of the air to its revolution is relatively slight, and rotation of the bobbin is due solely to the centrifugal effect of the revolution of the yarn. If the yarn is very light, the centrifugal effect of its revolution is relatively slight, and rotation of the bobbin is due chiefly to the air resistance.

By use of my invention the advantages of both end delivery and unrolling are obtained. So much yarn is withdrawn by end delivery that the bobbin does not rotate sufficiently to cause chattering and irregularity of delivcry, but fast enough to free the yarn from its surface. The resistances to delivery of the yarn from the bobbin are practically eliminated, insuring an even tension of delivery heretofore unattainable. This evenness of tension is desirable in winding all materials and is absolutely essential in winding certain materials which because of their texture tend to bulge badly when wound and whose tendency to bulge is accentuated by any irregularities of tension.

Delivery from a bobbin by end delivery alters the twist of the yarn, one turn for each coil removed. Delivery by rotation produces no change in the twist. Hence delivery by a combination of end delivery and rotation produces less alteration of twist than delivery by end delivery alone, depending on the relative number of rotations of the bobbin and revolutions of the yarn.

By use of my device yarn may also be readily and fully withdrawn from bobbins which without it would not deliver yarn over their ends at all or only with frequent breakage.

I am aware that devices have been constructed for withdrawing materials from the end of a supplypackage by combined rotation and end delivery, but not in the manner or for the purpose designed by me, by so constructing the device as to eliminate the effects of momentum and inertia and employ to advantage the eifects of air resistance and centrifugal action.

It is obvious that my invention may be embodied in other structures than the one above described. Fig. 3 illustrates a structure in which the step d is secured in the tube-holder, and for the screw e is substituted the conical pivoted head 7r. in the spindle. Longitudinal movement of the bobbin-holder ais prevented by the pin Z, which passes between the conical head and the end of the spindle c. This structure is less satisfactory than the preferred structure described, because the inverted step can retain no oil for lubrication and is also less accessible for lubrication.

Without limiting myself to the character of the material with which the supply-holder is to be used to the form of supply-package, which may be a spool, a frame-bobbin, a mulecop, &c., or to the particular form and arrangement of the structure employed for the bobbin-holder, I claim as my invention- 1. The combination in abobbin-holder, of a spindle, a sleeve mounted on a pivot-bearing to rotate about the spindle, and connections between thetwo to prevent longitudinal movement of the sleeve on the spindle.

2. The combination in a bobbin-holder, of a spindle, a sleeve for holding the bobbin and rotatable about the spindle on a pivot-bearing, the said spindle and sleeve having cooperating portions to prevent longitudinal movement of said sleeve on the spindle.

3. In a bobbin-holder, the combination of a sleeve (1, a spindle 0 having a conical seat in its extremity and a conical pointed screw in the end of the sleeve engaging said seat, but removable from the sleeve forlubricat-in g said seat.

' 4:. In abobbin-l1older,the combination with a spindle c, and a sleeve (1, having bearings forsaid spindle, of a step d, with conical seat, mounted in the end of the spindle, and a conically-pointed screw 6 mounted in the sleeve and bearing in said step, substantially as de scribed.

5. In a bobbin-holder, the combination with a spindle c and a step (Z mounted therein, but of larger diameter than the spindle, of aholder a having bearings on the spindle, a counterbore into which said step fits having an end bearing against the shoulder formed by the counterbore, and of a conical pointed screw mounted in the end of the holder and bearing on the step d, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SIMON XV. WARDW'ELL.

\Vitnesses:

ARTHUR A. ARMINGTON, CHARLES A. EDDY.

IIO 

